51320071420 has 24 divisors (see below), whose sum is σ = 107919209664. Its totient is φ = 20500017216.

The previous prime is 51320071399. The next prime is 51320071441. The reversal of 51320071420 is 2417002315.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (51320071399) and next prime (51320071441).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1735684 + ... + 1765003.

It is an arithmetic number, because the mean of its divisors is an integer number (4496633736).

Almost surely, 2^51320071420 is an apocalyptic number.

It is an amenable number.

51320071420 is an abundant number, since it is smaller than the sum of its proper divisors (56599138244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51320071420 is a wasteful number, since it uses less digits than its factorization.

51320071420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3501429 (or 3501427 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

Adding to 51320071420 its reverse (2417002315), we get a palindrome (53737073735).

The spelling of 51320071420 in words is "fifty-one billion, three hundred twenty million, seventy-one thousand, four hundred twenty".